Joseph Hayes

Born : 1982 Cat. M40 Ultrarunner since 2013

DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.

DUV-index+ ?Largest integer N such that the race distances provide at least N complete segments of N km in total. A single long race may therefore contribute several segments. See the DUV-Index tab for the detailed calculation. calculation details

Countries visited ?

United States

9,8%

Rank quotient ?This runner's calculation uses 23 eligible race(s): Σ(rank − 1) = 610; Σ finishers = 6 230. 610 / 6 230 × 100 = 9.79%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed23

Km — ultra races1 539 km

Longest race100,0 km

24th Miwok 100k Trail Race — 4/5/2019

Km per year (ultra races)

2022

2023

2024

2025

2026

Race types (share of distance)

Trail100,0%

Wins & podiums (ultra)

🏆 Win1

🏆 Win M1

🏅 Top 32

🏅 Top 3 M2

Longest winning streak1

Current streak0

Records

50 km3h58'39 100 km11h24'00 50 mi8h16'31

HISTORY

23 race(s)

Date		Race	Perf.	Rk
2025
12.04	50km	10th Woodside Purisima Creek Crossover	6:01:21 h	18
2019
04.05	100km	24th Miwok 100k Trail Race	11:58:55 h	46
2018
05.05	100km	23nd Miwok 100k Trail Race	12:13:48 h	62
14.04	50km	10th Diablo Trails Challenge	6:04:17 h	10
2017
26.08	31.5mi	18th Tamalpa Headlands 50K	5:31:33 h	22
06.08	50km	36th Skyline 50k Endurance Run	4:45:22 h	19
06.05	100km	22nd Miwok 100k Trail Race	11:29:08 h	38
15.04	50km	9th Diablo Trails Challenge	5:47:43 h	10
04.03	50km	28th Way Too Cool 50K Endurance Run	4:40:07 h	67
2016
26.11	28mi	32nd Quad Dipsea Trail Run	5:48:48 h	44
07.05	100km	21st Miwok 100k Trail Race	11:24:00 h	37
05.03	50km	27th Way Too Cool 50K Endurance Run	4:09:25 h	37
2015
12.09	50mi	9th Headlands Hundred 50 Mile Endurance Run	8:16:31 h	1 🏆
29.08	31.5mi	16th Tamalpa Headlands 50K	4:55:57 h	31
07.03	50km	26th Way Too Cool 50K Endurance Run	3:58:39 h	33
10.01	100km	15th Bandera 100 km Ultratrail	12:44:27 h	26
10.01	100km	15th Bandera 100 km Ultratrail - US Trail Championships	12:44:27 h	18
2014
06.12	50mi	8th Endurance Challenge - California Trail 50 Mile	8:21:32 h	73
15.11	50km	3rd Mt. Tam Trail Run	4:50:09 h	3 🥉
13.09	50mi	8th Headlands Hundred 50 Mile Endurance Run	8:33:37 h	4
23.08	31.5mi	15th Tamalpa Headlands 50K	5:03:48 h	23
10.05	50km	31st Quicksilver 50 km Endurance Run	4:43:00 h	6
2013
10.08	50km	3rd Crystal Springs 50 km Summer Trail Run	4:40:27 h	5

Filter

Runner	Races in common

DUV-index calculation details

#	Date	Race	Credited km	DUV-index+
✓ 1	4/5/2019	24th Miwok 100k Trail Race	100,00	×3
✓ 2	5/5/2018	23nd Miwok 100k Trail Race	100,00	×3
✓ 3	6/5/2017	22nd Miwok 100k Trail Race	100,00	×3
✓ 4	7/5/2016	21st Miwok 100k Trail Race	100,00	×3
✓ 5	10/1/2015	15th Bandera 100 km Ultratrail	100,00	×3
✓ 6	12/9/2015	9th Headlands Hundred 50 Mile Endurance Run	80,47	×2
✓ 7	6/12/2014	8th Endurance Challenge - California Trail 50 Mile	80,47	×2
✓ 8	13/9/2014	8th Headlands Hundred 50 Mile Endurance Run	80,47	×2
✓ 9	26/8/2017	18th Tamalpa Headlands 50K	50,69	×1
✓ 10	29/8/2015	16th Tamalpa Headlands 50K	50,69	×1
✓ 11	23/8/2014	15th Tamalpa Headlands 50K	50,69	×1
✓ 12	12/4/2025	10th Woodside Purisima Creek Crossover	50,00	×1
✓ 13	14/4/2018	10th Diablo Trails Challenge	50,00	×1
✓ 14	6/8/2017	36th Skyline 50k Endurance Run	50,00	×1
✓ 15	15/4/2017	9th Diablo Trails Challenge	50,00	×1
✓ 16	4/3/2017	28th Way Too Cool 50K Endurance Run	50,00	×1
✓ 17	5/3/2016	27th Way Too Cool 50K Endurance Run	50,00	×1
✓ 18	7/3/2015	26th Way Too Cool 50K Endurance Run	50,00	×1
✓ 19	15/11/2014	3rd Mt. Tam Trail Run	50,00	×1
✓ 20	10/5/2014	31st Quicksilver 50 km Endurance Run	50,00	×1
✓ 21	10/8/2013	3rd Crystal Springs 50 km Summer Trail Run	50,00	×1
✓ 22	26/11/2016	32nd Quad Dipsea Trail Run	45,06	×1